Fix some typos.

cranelift/src/compile.rs

@@ -37,7 +37,7 @@ fn handle_module(
     let test_file = parse_test(&buffer).map_err(|e| format!("{}: {}", name, e))?;
 
     // If we have an isa from the command-line, use that. Otherwise if the
-    // file contins a unique isa, use that.
+    // file contains a unique isa, use that.
     let isa = if let Some(isa) = fisa.isa {
         isa
     } else if let Some(isa) = test_file.isa_spec.unique_isa() {

cranelift/src/filetest/concurrent.rs

@@ -119,7 +119,7 @@ fn worker_thread(
             loop {
                 // Lock the mutex only long enough to extract a request.
                 let Request(jobid, path) = match requests.lock().unwrap().recv() {
-                    Err(..) => break, // TX end shuit down. exit thread.
+                    Err(..) => break, // TX end shut down. exit thread.
                     Ok(req) => req,
                 };
 

cranelift/src/filetest/runner.rs

@@ -221,7 +221,7 @@ impl TestRunner {
         }
         self.tests[jobid].state = State::Done(result);
 
-        // Rports jobs in order.
+        // Reports jobs in order.
         while self.report_job() {
             self.reported_tests += 1;
         }